CN106354533B - A kind of module dynamic loading method and device - Google Patents
A kind of module dynamic loading method and device Download PDFInfo
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- CN106354533B CN106354533B CN201610757151.0A CN201610757151A CN106354533B CN 106354533 B CN106354533 B CN 106354533B CN 201610757151 A CN201610757151 A CN 201610757151A CN 106354533 B CN106354533 B CN 106354533B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
Abstract
The invention discloses a kind of module dynamic loading method and devices, when needing dynamically load application module, construct a new servlet service object, when receiving servlet request, the servlet received request is transmitted to new servlet service object using original servlet service object, to realize the dynamically load of application modules by new servlet service object, and after the completion of new service object's building, the servlet service object that is constructed when destroying last module dynamically load.Using method disclosed by the invention without rebuilding project framework, in each dynamically load application module, new servlet service object need to only be constructed, therefore, the present invention realizes the dynamically load that can be still realized in the case where keeping project framework constant to module, it is not only easy to realize, and learning cost is low, the manpower of consuming and time are less.
Description
Technical field
The present invention relates to module loading technical fields, more specifically, being related to a kind of module dynamic loading method and device.
Background technique
In java web application, the B/S that usually there are many needs long lasting for operation is applied, these are applied sometimes
It may require that and add or delete some application modules, at this moment just need do not stopping answering to realize using module Dynamic loading technique
In the case where, application module is dynamically added or deleted.
Currently, common module Dynamic loading technique is OSGi technology, OSGi technology is Java mobilism modular system
A series of specifications and technology based on the specification realize, be the module Dynamic loading technique in a kind of more fine granularity.Although
The dynamically load of application modules may be implemented in OSGi technology, but does not use OSGi technology when a project is in framework,
And when increasing module dynamically load demand (such as dynamically load demand to MVC module) in project development process, it may
It just needs to rebuild project framework.Due to OSGi technology complexity with higher, it is inevitable to rebuild project framework
It will lead to learning cost increase, and can also expend more manpower and time.
To sum up, a kind of module dynamic loading method and system how are provided, to realize in the feelings for keeping project framework constant
It can still realize that the dynamically load of module be those skilled in the art's technical problem urgently to be resolved under condition.
Summary of the invention
In view of this, the present invention discloses a kind of module dynamic loading method and device, project framework is being kept not to realize
The dynamically load to module can be still realized in the case where change.
A kind of module dynamic loading method, comprising:
When needing dynamically load application module, a new servlet service object is constructed；
When receiving servlet request, servlet request is sent to original servlet service object；
Servlet request the new servlet is transmitted to using the original servlet service object to take
Business object is handled, to realize the dynamically load to the application module by the new servlet service object；
After the completion of the new servlet service object building, constructed when destroying last module dynamically load
Servlet service object.
Preferably, described when needing dynamically load application module, one new servlet service object of building includes:
When needing dynamically load application module, obtaining the application module needs all resources to be loaded；
Classloader ClassLoader predetermined is constructed using all resources；
The initial method for calling spring Request dispatcher, construct to the resource in the ClassLoader
To the new servlet service object；
The address of the new servlet service object is saved into the original servlet service object.
Preferably, described to include: using all resources constructions Classloader ClassLoader predetermined
All resources are divided into fixed class resource and variation class resource；
The fixed class resource is constructed to obtain father using uniform resource locator loader URLClassLoader
Loader；
Using father's loader as parent, the variation class resource is constructed using the URLClassLoader
Obtain sub- loader, wherein father's loader and the sub- loader constitute the ClassLoader.
Preferably, it is described servlet request is transmitted to using the original servlet service object it is described new
Servlet service object handle, the application module is moved with being realized by the new servlet service object
State loads
Judge to whether there is the request for belonging to same kind but adhering to different ClassLoader separately in the servlet request；
The request if it exists then replicates the attribute in corresponding first request entity of the request, obtains institute
State the duplication attribute of the first request entity；
According to the resource in the duplication attribute and ClassLoader predetermined, the second request entity is obtained, wherein
The resource is that the application module needs all resources to be loaded；
Second request entity is transmitted to the new servlet using the original servlet service object
Service object is handled, to realize the dynamically load to the application module by the new servlet service object.
Preferably, described after the completion of the new servlet service object building, destroy last module dynamically load
When the process of servlet service object that constructs include:
After the completion of the new servlet service object building, constructed when destroying the last module dynamically load
Servlet service object in resource in network application container, and the network application container is set to sky；
The resource in servlet service object's neutron loader constructed when destroying the last module dynamically load,
And the sub- loader is set to sky；
The servlet service object constructed when destroying the last module dynamically load.
Preferably, it after the servlet service object constructed when destroying the upper primary module dynamically load, also wraps
It includes:
Servlet service pair using system rubbish recovering method to being constructed when destroying the last module dynamically load
The rubbish generated as during is recycled.
A kind of module dynamic loading device, comprising:
Construction unit, for constructing a new servlet service object when needing dynamically load application module；
Transmission unit, for servlet request being sent to original when receiving servlet request
Servlet service object；
Retransmission unit, it is described for being transmitted to servlet request using the original servlet service object
New servlet service object is handled, to be realized by the new servlet service object to the application module
Dynamically load；
Unit is destroyed, after the completion of working as the new servlet service object building, last module dynamic is destroyed and adds
The servlet service object constructed when load.
Preferably, the construction unit includes:
Subelement is obtained, needs institute to be loaded for when needing dynamically load application module, obtaining the application module
There is resource；
Subelement is constructed, for constructing Classloader ClassLoader predetermined using all resources；
Subelement is instantiated, for calling the initial method of spring Request dispatcher, in the ClassLoader
Resource constructed to obtain the new servlet service object；
Saving subunit, for saving the address of the new servlet service object to the original servlet
In service object.
Preferably, the construction subelement includes:
Resource category divides subelement, for all resources to be divided into fixed class resource and variation class resource；
Father's loader constructs subelement, for utilizing uniform resource locator loader URLClassLoader to described solid
Determine class resource to be constructed to obtain father's loader；
Sub- loader constructs subelement, for utilizing the URLClassLoader using father's loader as parent
The variation class resource is constructed to obtain sub- loader, wherein described in father's loader and the sub- loader composition
ClassLoader。
Preferably, the retransmission unit includes:
Judgment sub-unit, for judging in servlet request with the presence or absence of belonging to same kind but adhere to difference separately
The request of ClassLoader；
Subelement is replicated, in the case where the judgment sub-unit is judged as YES, then corresponding to the request the
Attribute in one request entity is replicated, and the duplication attribute of first request entity is obtained；
Second request entity obtains subelement, for according in the duplication attribute and ClassLoader predetermined
Resource, the second request entity is obtained, wherein the resource is that the application module needs all resources to be loaded；
Subelement is forwarded, for being transmitted to second request entity using the original servlet service object
The new servlet service object is handled, and applies mould to described to realize by the new servlet service object
The dynamically load of block.
Preferably, the destruction unit includes:
First destroys subelement, for destroying the last time after the completion of the new servlet service object building
Resource in the servlet service object constructed when module dynamically load in network application container, and the network application is held
Device is set to sky；
Second destroys subelement, the servlet service object constructed when for destroying the last module dynamically load
Resource in neutron loader, and the sub- loader is set to sky；
Third destroys subelement, the servlet service object constructed when for destroying the last module dynamically load.
Preferably, further includes:
Garbage reclamation subelement, the servlet service pair for being constructed when destroying the upper primary module dynamically load
Servlet service pair as later, using system rubbish recovering method to being constructed when destroying the last module dynamically load
The rubbish generated as during is recycled.
It is dynamic when needing from above-mentioned technical solution it is found that the invention discloses a kind of module dynamic loading method and device
When state loads application module, a new servlet service object is constructed, when receiving servlet request, using original
The servlet received request is transmitted to new servlet service object by servlet service object, to pass through newly
Servlet service object realizes the dynamically load of application modules, and after the completion of new service object's building, destroys last
The servlet service object constructed when module dynamically load.It follows that using method disclosed by the invention without rebuilding
Project framework only need to construct new servlet service object in each dynamically load application module, therefore, the present invention
The dynamically load that can be still realized in the case where keeping project framework constant to module is realized, is not only easy to realize, and is learnt
At low cost, the manpower of consuming and time are less.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
Disclosed attached drawing obtains other attached drawings.
Fig. 1 is a kind of method flow diagram of module dynamic loading method disclosed by the embodiments of the present invention；
Fig. 2 is a kind of method flow diagram for constructing new servlet service object disclosed by the embodiments of the present invention；
Fig. 3 is a kind of method flow diagram for destroying original servlet service object disclosed by the embodiments of the present invention；
Fig. 4 is a kind of structural schematic diagram of module dynamic loading device disclosed by the embodiments of the present invention；
Fig. 5 is a kind of structural schematic diagram of construction unit disclosed by the embodiments of the present invention；
Fig. 6 is a kind of structural schematic diagram of construction unit disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of module dynamic loading method and devices, are keeping project framework constant to realize
In the case where can still realize dynamically load to module.
Referring to Fig. 1, a kind of method flow diagram of module dynamic loading method disclosed by the embodiments of the present invention, this method includes
Step:
Step S101, when needing dynamically load application module, a new servlet service object is constructed；
Wherein, the application module for needing dynamically load can be MVC module.
The full name of Servlet is Java Servlet, is the server with written in Java.
Step S102, when receiving servlet request, servlet request is sent to original servlet service pair
As；
It should be noted that due to new servlet service object and original servlet service object adhere to separately it is different
ClassLoader (Classloader), new servlet service object are sightless for server, therefore for client
The servlet of transmission is requested, and server can still send it to original servlet service object.
Step S103, servlet request is transmitted to using the original servlet service object described new
Servlet service object is handled, to realize the dynamic to the application module by the new servlet service object
Load；
Wherein, to make new servlet service object come into force, server need to be incited somebody to action by original servlet service object
Servlet request is transmitted to new servlet service object, to realize application modules by new servlet service object
Dynamically load.
Step S104, it after the completion of new servlet service object building, is constructed when destroying last module dynamically load
Servlet service object.
It should be noted that original servlet service object is constructed by server (for example, Tomcat), own
Original servlet service object can be all sent to by the request of server to handle, the present invention will be by that will be sent to original
The servlet request of the servlet service object of beginning is transmitted to new servlet service object and handles, and realizing will
Servlet request is forwarded to new servlet service object from original servlet service object, to realize application modules
Dynamically load.Therefore, actually there are two servlet service objects in server in the present invention: an original servlet
Service object and a new servlet service object, the address of new servlet service object are stored in original
In servlet service object, original servlet service object exists always, will not be destroyed.In servlet new every time
After the completion of service object creates, what new servlet service object will replace constructing when last module dynamically load
Servlet service object, based on the considerations of server performance, it is also necessary to be constructed when destroying last module dynamically load
Servlet service object.
Wherein, the present invention does not modify to original servlet service object but constructs new servlet service pair
As the reason of are as follows: original servlet service object be by server (for example, Tomcat) construct, it is all to pass through server
Request can all be sent to original servlet service object and handle.If desired the request that client is sent is handed to
Other servlet service object must just modify the servlet build mechanism or request transmission mechanism of server, thus
It can go deep into the details of server, dependence is generated to specific server, ultimately causes being highly coupled for project and server.Cause
This, the present invention directly modifies the technological means of original servlet service object there is no using, but uses and construct newly
Servlet request is transmitted to new servlet service pair by original servlet service object by servlet service object
As realizing the dynamically load of application modules, wherein the application module can be new application module.
In summary, the present invention can construct a new servlet service pair in each dynamically load application module
As servlet request being then transmitted to new servlet service object using original servlet service object, by new
Servlet service object realize application modules dynamically load.For existing scheme, the present invention is without rebuilding
Project framework only need to construct new servlet service object in each dynamically load application module, it is achieved that
The dynamically load to module can be still realized in the case where keeping project framework constant, be not only easy to realize, and learning cost
Low, the manpower of consuming and time are less.
In addition, compared to existing technologies, implementation of the present invention is simple and easy, does not need developer and dynamically load is answered
Excessive concern is carried out with the details of module, developer is facilitated to use, and easy to maintain.
It should be noted that the present invention is that the SpringMVC frame based on lightweight is realized.
In order to further optimize the above embodiments, referring to fig. 2, the invention also discloses construct new servlet service object
Detailed process, comprising steps of
Step S201, when needing dynamically load application module, obtaining application module needs all resources to be loaded；
Wherein, it includes: class file, jar packet, configuration file etc. that application module, which needs all resources to be loaded,.
Step S202, ClassLoader predetermined is constructed using all resources；
Wherein, Classloader (Chinese are as follows: Classloader) is that one kind is used to load java class to Java Virtual Machine
One of loader.
Since new servlet service object and original servlet service object adhere to different ClassLoader separately,
Therefore, a ClassLoader need to be pre-defined for new servlet service object.
Step S203, call spring Request dispatcher initial method, to the resource in the ClassLoader into
Row building obtains new servlet service object；
Specifically, the initial method of spring Request dispatcher is called, to described using the reflection mechanism of java
Resource in ClassLoader is constructed to obtain new servlet service object.
Step S204, the address of new servlet service object is saved into original servlet service object.
Wherein, the address of new servlet service object is saved to the purpose into original servlet service object
It is: makes original servlet service object after receiving servlet request, new servlet can be found by the address
Servlet request is forwarded to new servlet service object by service object.
Wherein, in the present embodiment, step S202 be can specifically include:
All resources to be loaded are needed to be divided into fixed class resource and variation class resource application module first；Secondly it utilizes
URLClassLoader (Chinese: uniform resource locator loader) is constructed to obtain father to the fixed class resource to be added
Carry device；Again using father's loader as parent, variation class resource is constructed to obtain sub- load using URLClassLoader
Device, wherein father's loader and sub- loader constitute the ClassLoader in step S202.
It should be noted that require to reconfigure sub- loader when needing dynamically load application module every time, it is same with this
When, father's loader can be always maintained at constant.
Wherein, in above-described embodiment, servlet is requested to forward by step S103 using original servlet service object
It handles to new servlet service object, the application module is moved with being realized by new servlet service object
The process of state load specifically includes:
Belong to same kind first, it is determined that whether there is in servlet request but adhere to asking for different ClassLoader separately
It asks, if it exists the request, then the attribute in the first request entity corresponding to the request replicates, and obtains the first request entity
Duplication attribute；Then (namely pre- in step S202 according to the resource in duplication attribute and ClassLoader predetermined
The resource in ClassLoader first defined, the resource are also that application module needs all resources to be loaded), it obtains second and asks
Realistic body；The second request entity is finally transmitted to the new servlet service pair using original servlet service object
As being handled, to realize the dynamically load of application modules by new servlet service object.
It should be noted that the process of the network asynchronous request tool-class of the present embodiment namely modification extension spring.
In order to further optimize the above embodiments, the invention also discloses destroy original servlet service pair referring to Fig. 3
The detailed process of elephant, comprising steps of
Step S301, it after the completion of new servlet service object building, is constructed when destroying last module dynamically load
Servlet service object in resource in network application container (WebApplicationContext), and the network is answered
Sky is set to container；
Step S302, in the servlet service object's neutron loader constructed when destroying last module dynamically load
Resource, and the sub- loader is set to sky；
Step S303, the servlet service object constructed when destroying last module dynamically load.
It is understood that constructed when destroying upper primary module dynamically load servlet service object during,
Many system rubbish will necessarily be generated, system rubbish not only occupies Installed System Memory, also will affect the speed of service of system, therefore,
After the servlet that the present invention is constructed when having destroyed upper primary module dynamically load, entire Destruction can also be generated
Rubbish is purged.
Therefore, in order to further optimize the above embodiments, after step S303, can also include:
Step S304, using system rubbish recovering method to the servlet constructed when destroying last module dynamically load
The rubbish generated during service object recycles.
Wherein, system rubbish recovering method can select System.gc ().
Corresponding with above method embodiment, the invention also discloses a kind of module dynamic loading devices.
Referring to fig. 4, the structural schematic diagram of a kind of module dynamic loading device disclosed by the embodiments of the present invention, the device packet
It includes:
Construction unit 401, for constructing a new servlet service object when needing dynamically load application module；
It should be noted that due to new servlet service object and original servlet service object adhere to separately it is different
ClassLoader (Classloader), new servlet service object are sightless for server, therefore for client
The servlet of transmission is requested, and server can still send it to original servlet service object.
Transmission unit 402, for servlet request being sent to original when receiving servlet request
Servlet service object；
Retransmission unit 403, for being transmitted to servlet request using the original servlet service object
The new servlet service object is handled, and applies mould to described to realize by the new servlet service object
The dynamically load of block；
Wherein, to make new servlet service object come into force, server need to be incited somebody to action by original servlet service object
Servlet request is transmitted to new servlet service object, to realize application modules by new servlet service object
Dynamically load.
Unit 404 is destroyed, after the completion of working as new servlet service object building, last module dynamic is destroyed and adds
The servlet service object constructed when load.
It should be noted that original servlet service object is constructed by server (for example, Tomcat), own
Original servlet service object can be all sent to by the request of server to handle, the present invention will be by that will be sent to original
The servlet request of the servlet service object of beginning is transmitted to new servlet service object and handles, and realizing will
Servlet request is forwarded to new servlet service object from original servlet service object, to realize application modules
Dynamically load.Therefore, actually there are two servlet service objects in server in the present invention: an original servlet
Service object and a new servlet service object, the address of new servlet service object are stored in original
In servlet service object, original servlet service object exists always, will not be destroyed.In servlet new every time
After the completion of service object creates, what new servlet service object will replace constructing when last module dynamically load
Servlet service object, based on the considerations of server performance, it is also necessary to be constructed when destroying last module dynamically load
Servlet service object.
In summary, the present invention can construct a new servlet service pair in each dynamically load application module
As servlet request being then transmitted to new servlet service object using original servlet service object, by new
Servlet service object realize application modules dynamically load.For existing scheme, the present invention is without rebuilding
Project framework only need to construct new servlet service object in each dynamically load application module, it is achieved that
The dynamically load to module can be still realized in the case where keeping project framework constant, be not only easy to realize, and learning cost
Low, the manpower of consuming and time are less.
In addition, compared to existing technologies, implementation of the present invention is simple and easy, does not need developer and dynamically load is answered
Excessive concern is carried out with the details of module, developer is facilitated to use, and easy to maintain.
It should be noted that the present invention is that the SpringMVC frame based on lightweight is realized.
In order to further optimize the above embodiments, referring to Fig. 5, a kind of structure of construction unit disclosed by the embodiments of the present invention is shown
It is intended to, comprising:
Subelement 501 is obtained, it need to be to be loaded for when needing dynamically load application module, obtaining the application module
All resources；
Wherein, it includes: class file, jar packet, configuration file etc. that application module, which needs all resources to be loaded,.
Subelement 502 is constructed, for constructing Classloader ClassLoader predetermined using all resources；
Subelement 503 is instantiated, for calling the initial method of spring Request dispatcher, to described
Resource in ClassLoader is constructed to obtain the new servlet service object；
Saving subunit 504, for saving the address of the new servlet service object to described original
In servlet service object.
Wherein, the address of new servlet service object is saved to the purpose into original servlet service object
It is: makes original servlet service object after receiving servlet request, new servlet can be found by the address
Servlet request is forwarded to new servlet service object by service object.
Wherein, in the present embodiment, construction subelement 502 be can specifically include:
Resource category divides subelement, for all resources to be divided into fixed class resource and variation class resource；
Father's loader constructs subelement, for utilizing uniform resource locator loader URLClassLoader to described solid
Determine class resource to be constructed to obtain father's loader；
Sub- loader constructs subelement, for utilizing the URLClassLoader using father's loader as parent
The variation class resource is constructed to obtain sub- loader, wherein described in father's loader and the sub- loader composition
ClassLoader。
It should be noted that require to reconfigure sub- loader when needing dynamically load application module every time, it is same with this
When, father's loader can be always maintained at constant.
Wherein, in order to further optimize the above embodiments, retransmission unit 403 can specifically include:
Judgment sub-unit, for judging in servlet request with the presence or absence of belonging to same kind but adhere to difference separately
The request of ClassLoader；
Subelement is replicated, in the case where the judgment sub-unit is judged as YES, then corresponding to the request the
Attribute in one request entity is replicated, and the duplication attribute of first request entity is obtained；
Second request entity obtains subelement, for according in the duplication attribute and ClassLoader predetermined
Resource, the second request entity is obtained, wherein the resource is that the application module needs all resources to be loaded；
Subelement is forwarded, for being transmitted to second request entity using the original servlet service object
The new servlet service object is handled, and applies mould to described to realize by the new servlet service object
The dynamically load of block.
It should be noted that the process of the network asynchronous request tool-class of the present embodiment namely modification extension spring.
In order to further optimize the above embodiments, participate in Fig. 6, it is disclosed by the embodiments of the present invention it is a kind of destroy unit structure show
It is intended to, destroying unit includes:
First destroys subelement 601, for destroying last module after the completion of new servlet service object building
Resource in the servlet service object constructed when dynamically load in network application container (WebApplicationContext),
And the network application container is set to sky；
Second destroys subelement 602, and servlet service object's neutron for constructing when last module dynamically load adds
The resource in device is carried, and the sub- loader is set to sky；
Third destroys subelement 603, the servlet service object constructed when for destroying last module dynamically load.
It is understood that constructed when destroying upper primary module dynamically load servlet service object during,
Many system rubbish will necessarily be generated, system rubbish not only occupies Installed System Memory, also will affect the speed of service of system, therefore,
It, can also be to the rubbish of entire Destruction generation after the servlet that the present invention is constructed when having destroyed upper primary module dynamically load
Rubbish is purged.
Therefore, in order to further optimize the above embodiments, can also include:
Garbage reclamation subelement 604 is constructed for destroying when subelement 603 destroys upper primary module dynamically load in third
Servlet after, the servlet constructed when destroying last module dynamically load is serviced using system rubbish recovering method
The rubbish generated during object is recycled.
Wherein, system rubbish recovering method can select System.gc ().
It should be noted that the concrete operating principle of each component part refers to embodiment of the method correspondence in Installation practice
Part, details are not described herein again.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of module dynamic loading method characterized by comprising
When needing dynamically load application module, a new servlet service object is constructed；
When receiving servlet request, servlet request is sent to original servlet service object；
Servlet request is transmitted to the new servlet service pair using the original servlet service object
As being handled, to realize the dynamically load to the application module by the new servlet service object, comprising: sentence
The servlet that breaks whether there is the request for belonging to same kind but adhering to different ClassLoader separately in requesting；It is described if it exists
Request then replicates the attribute in corresponding first request entity of the request, obtains answering for first request entity
Attribute processed；According to the resource in the duplication attribute and ClassLoader predetermined, the second request entity is obtained, wherein
The resource is that the application module needs all resources to be loaded；It will be described using the original servlet service object
Second request entity is transmitted to the new servlet service object and handles, to pass through the new servlet service pair
As realizing the dynamically load to the application module；
After the completion of the new servlet service object building, the servlet that is constructed when destroying last module dynamically load
Service object.
2. module dynamic loading method according to claim 1, which is characterized in that described to need dynamically load application mould
When block, one new servlet service object of building includes:
When needing dynamically load application module, obtaining the application module needs all resources to be loaded；
Classloader ClassLoader predetermined is constructed using all resources；
The initial method for calling spring Request dispatcher, constructs the resource in the ClassLoader to obtain institute
State new servlet service object；
The address of the new servlet service object is saved into the original servlet service object.
3. module dynamic loading method according to claim 2, which is characterized in that described to be constructed using all resources
Classloader ClassLoader predetermined includes:
All resources are divided into fixed class resource and variation class resource；
The fixed class resource is constructed using uniform resource locator loader URLClassLoader to obtain father's load
Device；
Using father's loader as parent, the variation class resource is constructed to obtain using the URLClassLoader
Sub- loader, wherein father's loader and the sub- loader constitute the ClassLoader.
4. module dynamic loading method according to claim 1, which is characterized in that described when the new servlet clothes
It is engaged in after the completion of object building, the process of the servlet service object constructed when destroying last module dynamically load includes:
After the completion of the new servlet service object building, constructed when destroying the last module dynamically load
Resource in servlet service object in network application container, and the network application container is set to sky；
The resource in servlet service object's neutron loader constructed when destroying the last module dynamically load, and will
The sub- loader is set to sky；
The servlet service object constructed when destroying the last module dynamically load.
5. module dynamic loading method according to claim 4, which is characterized in that destroying the upper primary module dynamic
After the servlet service object constructed when load, further includes:
Using system rubbish recovering method to the servlet service object's constructed when destroying the last module dynamically load
The rubbish generated in the process is recycled.
6. a kind of module dynamic loading device characterized by comprising
Construction unit, for constructing a new servlet service object when needing dynamically load application module；
Transmission unit, for servlet request being sent to original servlet and is taken when receiving servlet request
Business object；
Retransmission unit is described new for being transmitted to servlet request using the original servlet service object
Servlet service object is handled, to realize the dynamic to the application module by the new servlet service object
Load；
Unit is destroyed, after the completion of working as the new servlet service object building, when destroying last module dynamically load
The servlet service object of building；
Wherein, the retransmission unit includes:
Judgment sub-unit, for judging in servlet request with the presence or absence of belonging to same kind but adhere to difference separately
The request of ClassLoader；
Subelement is replicated, in the case where the judgment sub-unit is judged as YES, then asking to the request corresponding first
Attribute in realistic body is replicated, and the duplication attribute of first request entity is obtained；
Second request entity obtains subelement, for according to the money in the duplication attribute and ClassLoader predetermined
Source obtains the second request entity, wherein the resource is that the application module needs all resources to be loaded；
Subelement is forwarded, it is described for being transmitted to second request entity using the original servlet service object
New servlet service object is handled, to be realized by the new servlet service object to the application module
Dynamically load.
7. module dynamic loading device according to claim 6, which is characterized in that the construction unit includes:
Subelement is obtained, needs all moneys to be loaded for when needing dynamically load application module, obtaining the application module
Source；
Subelement is constructed, for constructing Classloader ClassLoader predetermined using all resources；
Subelement is instantiated, for calling the initial method of spring Request dispatcher, to the money in the ClassLoader
Source is constructed to obtain the new servlet service object；
Saving subunit is serviced for saving the address of the new servlet service object to the original servlet
In object.
8. module dynamic loading device according to claim 7, which is characterized in that the construction subelement includes:
Resource category divides subelement, for all resources to be divided into fixed class resource and variation class resource；
Father's loader constructs subelement, for utilizing uniform resource locator loader URLClassLoader to the fixed class
Resource is constructed to obtain father's loader；
Sub- loader constructs subelement, is used for using father's loader as parent, using the URLClassLoader to institute
It states variation class resource to be constructed to obtain sub- loader, wherein described in father's loader and the sub- loader composition
ClassLoader。
9. module dynamic loading device according to claim 6, which is characterized in that the destruction unit includes:
First destroys subelement, for destroying the last module after the completion of the new servlet service object building
Resource in the servlet service object constructed when dynamically load in network application container, and the network application container is set
For sky；
Second destroys subelement, the servlet service object's neutron constructed when for destroying the last module dynamically load
Resource in loader, and the sub- loader is set to sky；
Third destroys subelement, the servlet service object constructed when for destroying the last module dynamically load.
10. module dynamic loading device according to claim 6, which is characterized in that further include:
Garbage reclamation subelement, servlet service object for being constructed when destroying the upper primary module dynamically load it
Afterwards, using system rubbish recovering method to the servlet service object's constructed when destroying the last module dynamically load
The rubbish generated in the process is recycled.
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